Kokkos: allow c++17 starting with CUDA v11.0.0 (#25018)

var/spack/repos/builtin/packages/kokkos/package.py

@@ -197,7 +197,7 @@ class Kokkos(CMakePackage, CudaPackage, ROCmPackage):
     variant("pic", default=False, description="Build position independent code")
 
     # nvcc does not currently work with C++17 or C++20
-    conflicts("+cuda", when="std=17")
+    conflicts("+cuda", when="std=17 ^cuda@:10.99.99")
     conflicts("+cuda", when="std=20")
 
     variant('shared', default=True, description='Build shared libraries')